You can trust it. This is a monitoring device suitable for family/office/school. It will automatically shut down after 8 seconds of non-use. Whether you are an outdoor sports enthusiast/senior, the oxygen saturation monitor will be a good tool for you.

Brand: Healthtree
Type: Led Finger Oximeter
Colour: Black
Country/Region of Manufacture: China
Product Line: Pulse Oximeter Manufacturer
Form Factor: Fingertip
MPN: pulse oximeter
Intended Use/Discipline: Family Medicine
Feature: portable
power sourse: Battery
Manufacturer Warranty: 1 Month
Labels & Certifications: CE/ FDA
Display Type: LED
Power Source: Battery
Features: With Alarm
Sensor Technology: Infrared Sensor
Note: Without bluetooth function